<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>PK</title>
</head>
<body>
   <div class="main">
    <div class="left">left</div>
    <div class="right">left</div>
   </div>
</body>
</html>